Dynamic triggering of type 3 codebook feedback

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a number of hybrid automatic repeat request (HARQ) bits to report to a base station for deferred HARQ or cancelled HARQ for one or more HARQ processes. The UE may transmit HARQ bits for the deferred HARQ or cancelled HARQ, up to the number of HARQ bits, after receiving downlink control information requesting the HARQ bits. Numerous other aspects are described.

What is claimed is: 
     
         1 . A user equipment (UE) for wireless communication, comprising:
 a memory; and   one or more processors operatively coupled to the memory, the one or more processors configured to:
 receive an indication of a number of hybrid automatic repeat request (HARQ) bits to report to a network entity for deferred HARQ or cancelled HARQ for one or more HARQ processes; and 
 transmit HARQ bits for the deferred HARQ or cancelled HARQ, up to the number of HARQ bits, after receiving downlink control information (DCI) requesting the HARQ bits. 
   
     
     
         2 . The UE of  claim 1 , wherein the one or more processors are configured to transmit the HARQ bits using type 3 codebook. 
     
     
         3 . The UE of  claim 1 , wherein the indication is received in a radio resource control (RRC) message, and wherein the DCI is 1 bit. 
     
     
         4 . The UE of  claim 3 , wherein the RRC message indicates a starting HARQ bit for reporting the HARQ bits. 
     
     
         5 . The UE of  claim 3 , wherein the RRC message indicates the number of HARQ bits to report in a semi-persistent scheduling configuration. 
     
     
         6 . The UE of  claim 3 , wherein the RRC message indicates the number of HARQ bits to report in a physical downlink shared channel serving cell configuration. 
     
     
         7 . The UE of  claim 3 , wherein the RRC message is received as part of establishing a radio access bearer. 
     
     
         8 . The UE of  claim 1 , wherein the indication is received in the DCI. 
     
     
         9 . The UE of  claim 8 , wherein the DCI indicates a starting HARQ bit for reporting the HARQ bits. 
     
     
         10 . The UE of  claim 1 , wherein the HARQ bits are for cancelled HARQ indications. 
     
     
         11 . The UE of  claim 1 , wherein the HARQ bits are for deferred semi-persistent scheduling physical uplink control channel HARQ deferrals. 
     
     
         12 . The UE of  claim 1 , wherein the number of HARQ bits is less than 16. 
     
     
         13 . The UE of  claim 1 , wherein the number of HARQ bits is less than 8. 
     
     
         14 . A network entity for wireless communication, comprising:
 a memory; and   one or more processors operatively coupled to the memory, the one or more processors configured to:
 transmit an indication of a number of hybrid automatic repeat request (HARQ) bits that a user equipment (UE) is to report for deferred HARQ or cancelled HARQ for one or more HARQ processes; and 
 receive HARQ bits for the deferred HARQ or cancelled HARQ, up to the number of HARQ bits, after transmitting downlink control information (DCI) requesting the HARQ bits. 
   
     
     
         15 . The network entity of  claim 14 , wherein the one or more processors are configured to receive the HARQ bits using type 3 codebook. 
     
     
         16 . The network entity of  claim 14 , wherein the one or more processors are configured to transmit the indication in a radio resource control (RRC) message and transmit the DCI as 1 bit. 
     
     
         17 . The network entity of  claim 16 , wherein the RRC message indicates a starting HARQ bit for reporting the HARQ bits. 
     
     
         18 . The network entity of  claim 16 , wherein the RRC message indicates the number of HARQ bits to report in a semi-persistent scheduling configuration. 
     
     
         19 . The network entity of  claim 16 , wherein the RRC message indicates the number of HARQ bits to report in a physical downlink shared channel serving cell configuration. 
     
     
         20 . The network entity of  claim 16 , wherein the one or RRC message is part of establishing a radio access bearer. 
     
     
         21 . The network entity of  claim 14 , wherein the one or more processors are configured to transmit the indication in the DCI. 
     
     
         22 . The network entity of  claim 21 , wherein the DCI indicates a starting HARQ bit for reporting the HARQ bits. 
     
     
         23 . The network entity of  claim 14 , wherein the HARQ bits are for cancelled HARQ indications. 
     
     
         24 . The network entity of  claim 14 , wherein the HARQ bits are for deferred semi-persistent scheduling physical uplink control channel HARQ deferrals. 
     
     
         25 . The network entity of  claim 14 , wherein the number of HARQ bits is less than 16. 
     
     
         26 . The network entity of  claim 14 , wherein the number of HARQ bits is less than 8. 
     
     
         27 . The network entity of  claim 14 , wherein the one or more processors are configured to select the number of HARQ bits based at least in part on one or more of a UE capability, uplink traffic conditions, or downlink traffic conditions. 
     
     
         28 . A method of wireless communication performed by a user equipment (UE), comprising:
 receiving an indication of a number of hybrid automatic repeat request (HARQ) bits to report to a network entity for deferred HARQ or cancelled HARQ for one or more HARQ processes; and   transmitting HARQ bits for the deferred HARQ or cancelled HARQ, up to the number of HARQ bits, after receiving downlink control information (DCI) requesting the HARQ bits.   
     
     
         29 . The method of  claim 28 , further comprising transmitting the HARQ bits using type 3 codebook. 
     
     
         30 . A method of wireless communication performed by a network entity, comprising:
 transmitting an indication of a number of hybrid automatic repeat request (HARQ) bits that a user equipment (UE) is to report for deferred HARQ or cancelled HARQ for one or more HARQ processes; and   receiving HARQ bits for the deferred HARQ or cancelled HARQ, up to the number of HARQ bits, after transmitting downlink control information (DCI) requesting the HARQ bits.